 | | Gearing down a lego motor
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Hi, Before I invest a lot of time on this, what is the minimal gearing I need to do in order for a Lego motor to let itself up. How about a lego motor lifting itself and another motor up? I want the motor to be powerful but at the same time fast... (...) (24 years ago, 20-Jan-01, to lugnet.robotics.rcx, lugnet.robotics)
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| | Re: LegOS 0.2.5 and LNP
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(...) I cleaned up my code (found one bug!), the patch follows. As you may see now there are two semaphore, because two are the resources to give access to: the LNP buffer and the IR port. I modified the calling of the handlers to avoid race (...) (24 years ago, 20-Jan-01, to lugnet.robotics.rcx.legos)
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| | Vison Command & W2K
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I bought a Vision Command set and found that the LEGO software installer detects NT & 2K and refuses to go further. However, the CD for VC has 2k drivers and the QUICKCAM program works fine. Anyone have a way around this problem? (24 years ago, 19-Jan-01, to lugnet.robotics.rcx)
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| | Re: undefined reference to `___ucmpsi2'
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(...) With regards to this, it appears that Markus left out two necessary functions in lib/mint. Specifically, cmpsi2 and ucmpsi2. These are a part of librcx but apparently they were omitted from LegOS when Markus included support for the other (...) (24 years ago, 19-Jan-01, to lugnet.robotics.rcx.legos)
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| | Another way to avoid Float
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For the navigation of my robot, I do not plan to use float or trig function. I will use long integer (32bits). the high 16 bit are the true integer value. the low 16 bits are 1/65535 value. let say 1 = 0x00010000 2 = 0x00020000 2.5 = 0x00028000 2.25 (...) (24 years ago, 19-Jan-01, to lugnet.robotics.rcx)
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| | the 'java on host' concept
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to overcome limitations of the prog. size in my CM, and my experience with Java, I decided to have the applications running on the host laptop. In the mean time things are looking very good. I'm only running Java on the host. I didn't touch the CM. (...) (24 years ago, 19-Jan-01, to lugnet.robotics.rcx.java)
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| | legOS v2.5 merge-map utility still using perl ?
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I read somewhere that perl was no more needed in v2.5. And as I began with this v2.5 version, I didn't install perl. So when I try to use merge-map to get a symbolic disassembled file of my code, it fails. Should I install perl or is there any way (...) (24 years ago, 19-Jan-01, to lugnet.robotics.rcx)
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| | Visual NQC 2001
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Thanks to all who have tested my program. I know there are some problems and runtime errors. The biggest problem for me was the bad website on with some of you used the bugs report to tell me what's wrong, but this information didn't never reach my (...) (24 years ago, 19-Jan-01, to lugnet.robotics.rcx.nqc)
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| | Re: undefined reference to `___ucmpsi2'
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(...) Another choice may be a cast in the switch statement, like this: static wakeup_t light_found(wakeup_t sens_num) { switch ((unsigned int)sens_num) { case 2: return (LIGHT(SENSOR_2) > THRESHOLD); break; case 3: return (LIGHT(SENSOR_3) > (...) (24 years ago, 18-Jan-01, to lugnet.robotics.rcx.legos)
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| | Re: LegOS 0.2.5 and LNP
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(...) Ok, I clean up the code and send you a patch. (...) This one is not yet ready. As soon as I do it you'll know. bye Bernardo (24 years ago, 18-Jan-01, to lugnet.robotics.rcx.legos)
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| | Re: util/dll-src makefile patch
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(...) current cvs (...) lnp.c under (...) windows. The other (...) They works. :-) Bye, Paolo. --- I'm an optimist, but I don't think it helps. (24 years ago, 18-Jan-01, to lugnet.robotics.rcx.legos)
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| | Re: undefined reference to `___ucmpsi2'
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Hi, The problem is that wakeup_t is an unsigned long, and in order to save space, the switch statement is optimized to call a library comparator, ucmpsi2. Since the argument to ds_scale is an unsigned int, the argument to LIGHT should also be an (...) (24 years ago, 18-Jan-01, to lugnet.robotics.rcx.legos)
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| | Re: Vision command & macintosh
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(...) I had heard that the actual camera was a Logitech QuickCam, but I could find no Mac drivers on their site that will work with the Lego camera. Any ideas? John (24 years ago, 18-Jan-01, to lugnet.robotics, lugnet.robotics.rcx)
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| | undefined reference to `___ucmpsi2'
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I get this error when linking if I have the following in my source code in a wait_event function: #define THRESHOLD (unsigned short)50 static wakeup_t light_found(wakeup_t sens_num) { switch (sens_num) { case 2: return (LIGHT(SENSOR_2) > THRESHOLD); (...) (24 years ago, 18-Jan-01, to lugnet.robotics.rcx.legos)
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| | Re: pass by refrence or value?
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Did you care to declare your global variable as volatile? this (normaly) prevent the compiler to optimize memory access and force it to read the actual value of the variable each time it need it ( instead of localy storing it in a register wich will (...) (24 years ago, 18-Jan-01, to lugnet.robotics.rcx.legos)
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| | c++ changes
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After some prompting, I have made the method names in the c++ classes uniform in case. Unfortunately, the changes are not backward compatible. Please let me know of any problems you discover. If I don't hear of any problems, I'll check in the (...) (24 years ago, 18-Jan-01, to lugnet.robotics.rcx.legos)
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| | util/dll-src makefile patch
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Hi, Here is a set of patches for util/dll-src/Makefile against the current cvs version. The first patch avoids the need of a symbolic link to lnp.c under unix. Can somebody please let me know if it works under windows. The other patches are for (...) (24 years ago, 18-Jan-01, to lugnet.robotics.rcx.legos)
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| | pass by refrence or value?
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Hi all, i have a slight problem with legosv0.2.5 . The program code on the rcx is set up so that there is serverall callback methods which get called when a message comes in on the particular port for that object or class. These callback methods set (...) (24 years ago, 18-Jan-01, to lugnet.robotics.rcx.legos)
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| | Re: LegOS 0.2.5 and LNP
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(...) Btw. README is (...) Ooops... :-) Changed to 0.2.5 version inside. (...) transport (...) packets of (...) mainly as way for (...) collisions, lost (...) which works as (...) write code to (...) To cut time (...) code that (...) directives (...) (24 years ago, 17-Jan-01, to lugnet.robotics.rcx.legos)
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| | LegOS 0.2.5 and LNP
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Yesterday I downloaded legOS 0.2.5 and peeked at the code. Btw. README is not up to date. For last two month I was working with a friend of mine on a transport protocol implemented on top of LNP for the transmission of packets of unlimited size and (...) (24 years ago, 17-Jan-01, to lugnet.robotics.rcx.legos)
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